This is a Westcott 40 Degree Fabric Grid for 36 x 48" Shallow Soft Box. The honeycomb pattern limits the light spread from your softbox to 40° to control spill, yielding the flattering quality of light of a softbox with the directionality of a reflector. It fastens to the recessed front of the box via touch fasteners. The shape of the shallow soft box allows you to squeeze this portrait and product light-shaping tool into tight spaces, where it is especially vital to use the grid to control spill light.